Glass film laminate

Abstract

The glass film laminate comprises a laminate structure of three or more layers, which includes a layer formed of a glass film and a transparent resin layer. The both outermost layers of the glass film laminate are formed of the glass film. The glass film has a thickness of 300 μm or less, and the transparent resin layer has a thickness larger than that of the glass film.

Description

TECHNICAL FIELD[0001]The present invention relates to a glass material used for a building, an automobile, an agricultural greenhouse, a glass substrate for a device, as exemplified by a flat panel display such as a liquid crystal display or an OLED display, a solar cell, a lithium ion battery, a digital signage, a touch panel, electronic paper, a cover glass for a device, as exemplified by an OLED lighting device, a package for medicinal products, and the like. More specifically, the present invention relates a glass material which is excellent in weather resistance and is lightweight.BACKGROUND ART[0002]A glass sheet is excellent in weather resistance, chemical resistance, and abrasion resistance, and is excellent in lighting property because of its good transparency, and hence the glass sheet is widely used for window or skylight materials in general buildings, high-rise buildings, and the like, a covering material for an agricultural greenhouse, and window materials for vehicles...

AI Technical Summary

Benefits of technology

[0017]In the glass film laminate of the present invention, the outermost layers are formed of the glass film, and hence the transparent resin layer can be prevented from being exposed to an external environment. In addition, the thickness of the glass film is 300 μm or less and the thickness of the transparent resin layer is larger than that of the glass film, and hence it is possible to decrease as much as possible the total thickness of the glass films in the thickness of the glass film laminate and to increase the thickness of the transparent resin layer. As a result, a glass film laminate having a reduced weight can be provided.

[0018]When the glass film laminate of the present invention comprises the laminate structure of three layers, which is constituted by the both outermost layers of the glass film and the transparent resin layer interposed between the both outermost layers of the glass film, it is possible to minimize the amount of usage of glass films having a high density. As a result, the weight of the whole glass film laminate can be reduced more effectively.

[0019]When the transparent resin layer has a thickness ten times or more than that of the glass film, in the glass film laminate of the present invention, the ratio of the transparent resin layer in the glass film laminate increases, and hence the weight of the whole glass film laminate can be further reduced. Thereby, the weight of the glass film laminate can be reduced more effectively.

[0020]When the glass film is made of alkali-free glass, in the glass film laminate of the present invention, the weather resistance and chemical resistance of the glass film improve, and hence it is possible to provide a glass film laminate suitable for longer time use.

[0021]When the glass film is manufactured by an overflow down-draw method, in the glass film laminate of the present invention, a glass film having a thickness of 300 μm or less can be manufactured in bulk at low cost. The glass film manufactured by the overflow down-draw method does not need adjustment of its thickness by polishing, grinding, chemical etching, or the like.

[0022]When the glass film has a Young's modulus of 50 GPa or more, in the glass film laminate of the present invention, a glass film laminate having a desired rigidity can be provided even if the thickness of the glass film is made thin for accomplishing reduction in weight.

Problems solved by technology

However, glass is a brittle material, and hence has a problem in that glass is vulnerable to a physical impact and easily breaks.

It is known that, when a flying object or a high-speed object hits a glass sheet, the glass sheet easily breaks, and that glass also easily breaks due to a thermal impact.

Besides, the transparent resin material has an advantage of having higher physical impact resistance than glass, but has a disadvantage of being inferior in chemical resistance, weather resistance, and abrasion resistance to glass.

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